Nobody can explain the mystery ____ he suddenly disappeared.
A. why B. what C. whether D. which
It suddenly___ to me that we could use the computer to do the job.
A. stroke B. occurred C. happened D. saw
Though she _______for a moment, she finally went in and asked to see a dress that was in the window.
A .dared B. nerved C. wondered D. hesitated
The survey shows that a large number of teenagers are ________ cigarettes nowadays.
A. devoted to B. related to C .connected to D. addicted to
Rita _________two hours every Sunday afternoon to spend with her son.
A. sets out B. sets away C. sets aside D. sets off
Only when something gets lost _____________.
A. can you realize how important it is to you
B. how important you can realize it is to you
C. you can realize how important it is to you
D. can you realize how important is it to you
